It's not from any reference book. I was just describing a feature that is present in this stone. It was a bit of a "smokescreen" to deter you from the identifying moss like inclusions. Don't know what causes the haze.

Good smokescreen, JB! At first glance I thought "dendritic agate", but then remembered moss agate. The milky haze was confusing however as I don't remember ever seeing that hazy, billowy effect in a moss agate. It would be interesting to find out the cause.

My guess is the haze is just the concentric growth zoning in the chalcedony. This stuff is translucent, not transparent -- but it's close enough to transparent in this pic to make you think it should be see-through. The hazy effect sorta reminds me of the super-humid air here in Indiana the past week or so...

I'd also guess that the way JB has it lit for taking his picture exaggerates the effect -- most of the time you don't see agates back-lit like this.

Yes, it is translucent. The image was taken in darkfield with the stage fluorescent light on.

Here's the stone.

For those of you that have the GIA Colored Stone course materials, you can go to lesson #20 (quartz and chalcedony) pg. 46 and see a similar image to the one I posted. It too shows this milky translucency.

For those of you that have the GIA Colored Stone course materials, you can go to lesson #20 (quartz and chalcedony) pg. 46 and see a similar image to the one I posted. It too shows this milky translucency.

Geesh, I looked there yesterday. I think the heat and humidity are finally taking their toll.

Who is online

Users browsing this forum: No registered users and 1 guest

You cannot post new topics in this forumYou cannot reply to topics in this forumYou cannot edit your posts in this forumYou cannot delete your posts in this forumYou cannot post attachments in this forum